# many parts removed, this MAY not work as is for the missing parts => point it

# I am not sure what this line do, but it is there:
# If not running interactively, don't do anything
[ -z "$PS1" ] && return

export HISTCONTROL=ignoreboth:erasedups
export HISTSIZE=10000
export HISTFILESIZE=10000

# append to the history file, don't overwrite it
shopt -s histappend

# check the window size after each command and, if necessary,
# update the values of LINES and COLUMNS.
shopt -s checkwinsize

# Apaga linhas do histórico, aceitando mais de um argumento de uma vez
function histd()
{
    if (( $# < 1)); then
	echo 'Use assim: histd 15 14 13 12 [...]'
	echo -e "\tcom os números em ordem DECRESCENTE - ou não funciona"
	return
    fi
    ult=$1
    echo "history -d $1"
    teste=!$1
    echo "'$teste' devia funcionar... sqn"
    history -d $1
    while ((1)); do
	shift
	if (( $# == 0 )); then
	    break;
	fi
	if (( $ult < $1 )); then
	    echo 'Sou bonzinho, mas me ajude. Desse jeito dá errado!!'
	    echo 'Use assim: histd 15 14 13 12'
	    echo -e "\t Com TODOS os números em ordem DECRESCENTE!"
	    return
	fi
	echo "history -d $1"
	ult=$1
	history -d $1
    done;
}

# rmhist <primeira-linha-apagada> <última-apagada>
# -> Line numbers according to the output of history.
# -> Use history -w to force a write to the history file.
function rmhist()
{
    if (( $# < 1)); then
	echo 'rmhist <1a-linha-apagada> <última-linha-apagada>'
	echo -e '\tOu...'
	echo 'rmhist <quant-de-últimas-linhas-apagadas>'
	return
    fi

    if (( $# == 1 )); then
	comeco=$(( $HISTCMD-1 ))
	if (( $1 > 10 )); then return; fi
	if (( $1 < 0 )); then return; fi
	fim=$(( $HISTCMD-$1 ))
	for (( i=$comeco; i>=$fim; i--)); do
	    echo -n $i,
	    history -d $i
	done;
	echo
    elif (( $# == 2)); then
	for (( i=$2-$1; i>=0; i--)); do
	    history -d $1
	done
    fi
}
# vim: fileencoding=utf-8

# ~/.bash_logout: executed by bash(1) when login shell exits.

# when leaving the console clear the screen to increase privacy

if [ "$SHLVL" = 1 ]; then
    [ -x /usr/bin/clear_console ] && /usr/bin/clear_console -q
fi

 # make a backup, in any session, of the current history.
 cp ~/.bash_history ~/.bash_history__beforeTests.2016.09.07 #save everything as is

 # open session 1
history -c #1
history -w #1
history #1 should show only these 2 last lines

 # open session 2
 history #2 note the space. Will show only the -w line
aaaa #2
bbbb #2
cccc #2
dddd #2

 # close session 2

 # open session 3
 history #3
 # Should be:
 #   1  history -w
 #   2  aaaa
 #   3  bbbb
 #   4  cccc
 #   5  dddd

 # open session 4
bbbb #4
 history #4
 # Should be:
 #   1  history -w
 #   2  aaaa
 #   3  cccc
 #   4  dddd
 #   5  bbbb

 # close session 4
 # close session 3

 # open session 5
 history #5
 # Should be:
 #   1  history -w
 #   2  aaaa
 #   3  bbbb
 #   4  cccc
 #   5  dddd
 #   6  bbbb
 # note history entries 3 and 6: both should not exist!
 # close all these sessions

 # now, in any other session, reset the history to what it
 # was before the tests were made
 cp ~/.bash_history__beforeTests.2016.09.07 ~/.bash_history